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[quote user="Overmod"]I find I actually disagree ... but in a highly qualified sense. What I’m pushing for is very slight *revision* of the nominal Tier 4 final NO emission standard — justified, politically, by reference to concomitant Tier 4 reduction of photochemical adjuvants causing NO2 conversion in the atmosphere — by just that tenths-of-a-percent that allows the 710 to be built practically to pass.[/quote] When you look at my previous post, the 710 could have been made Tier 4 compliant but EMD deemed it impractical. Even if the Tier 4 regulations would be changed to let the 710 pass I think it wouldn't hold in court. For me that would look like preferential treatment of on competitor. Giving incentives for rebuilds to lower standards than Tier 4 (which is required now) would be OK I think. Regards, Volker
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